sc_ctlp          1555 net/if_ppp.c   	(*sc->sc_ctlp)(sc);
sc_ctlp            96 net/if_pppvar.h 	void	(*sc_ctlp)(struct ppp_softc *); /* rcvd control pkt */
sc_ctlp           220 net/ppp_tty.c      sc->sc_ctlp = pppasyncctlp;